Thank you to both dmanning23 and Avan_Madisen.
I have already looked at RB Whitakers tutorials but I couldn't get them to work with Monogame. An error I often see with XNA tutorials is the shader inputs expect a POSITION whereas Monogame is sending a Sv_Position. Changing that is straight forward but then I hit mutiple other problems and/or I could get my code to run but nothing was rendered.
I'll read through both suggestions again as I might have missed something.